Matt Sullivan

As night fell on an evacuated federal courthouse in Boston, confusing reports had provided a promising if unclear picture of a "breakthrough" in the case: Investigators appear to have just that — a picture, from a new surveillance video, that appears to show a man leaving a bag at the scene of the crime. But they may not have a name, and Gov. Deval Patrick pleaded for patience.

Tuesday night, in cruel echoes of a stubborn daytime before it, yielded precious but little new information the Boston bombs — and sad remembrances of one, two, and almost three of the dead. The bomber or bombers remained elusive, and President Obama was scheduled to visit the site of "an act of terror" Thursday. Catch up on the day after — and new medical information from Wednesday morning briefings — as authorities prepare for the days ahead.

Even as a city and a nation came together amidst the chaotic scene, there was not much good news in Boston this April 15. Catch up on all the details on the victims, the persons of interest, the moment of horror, and eyewitness accounts with the definitive account of a dark Patriot Day.

The 32-two-year-old Australian high-five expert awoke a nation of napping Americans early Sunday evening — and enlived an entire continent Down Under, where it was Monday morning — with a miracle 20-foot putt at the Masters and a double-overtime win worthy of a wild sports weekend in the South.

The spotlight returns to Ohio on Wednesday, and there's a new judge as hackers have returned, the 16-year-old alleged victim might testify after all, her friends can now testify against her, and the suspects are already speaking out.

International officials have confirmed that North Korea conducted its third nuclear weapons test on Tuesday, and that the rogue state may be hinting at more tests to come. Check here for all the latest updates.

The 35-minute blackout may not have exactly helped the ratings, but something like 100 million people still watched the Baltimore Ravens defeat the San Francisco 49ers — and it was good year for Super Bowl ads. Watch them all again here.